Question

A floor is $5m$ long and $4m$ wide. A square carpet of sides $3m$ is laid on the floor. Find the area of the floor that is not carpeted.

Answer 1

Area of the floor $=4m\times 5m=20m^2$

Area of carpet $=3m\times 3m=9m^2$

Area uncarpeted $=$ Area of the floor $-$ Area of carpet

$\Rightarrow$ Area uncarpeted $=20m^2-9m^2=11m^2$